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| The science of the structure of living organisms |
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| The science of the functioning of living organisms |
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| The smallest part of an element; indivisable by ordinary chemical means |
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| The basic biological unit of living organisms, containing a nucleus and a variety of organelles enclosed by a limiting membrane |
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| Particle consisting of two or more atoms held together by chemical bonds |
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| A group of similar cells specialized to perform a specific function; Primary tissue types are epithelial, connective, muscle, and nervous tissues. |
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| A part of the body formed of two or more tissues that performs a specialized function |
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| A group of organs that work together to perform a vital body function; e.g., Nervous system |
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| An individual living thing |
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| A state of body equilibrium or stable internal environment of the body |
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| An organ, gland or muscle capable of being activated by nerve endings. |
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| A corrective mechanism that opposes or negates a variation from normal limits. |
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| Feedback that tends to cause a variable to change in the same direction as the initial change; enhances the stimulus. |
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| Below, in reference to a particular structure, with the body in the anatomical position |
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| Farthest from the point of attachment of a limb or origin of a structure |
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| The sum total of the chemical reactions that occur in the body |
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| Some type of sensor that monitors and responds to changes in the environment |
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| Any of the building blocks of matter; oxygen, hydrogen, carbon, for example |
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| Substance composed of two or more different elements, the atoms of which are chemically united. |
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| An atom with a positive or negative electric charge |
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| Ionic compound that dissociates into charged particles (other than hydrogen or hydroxyl ions) when dissolved in water |
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| A substance that accelerates a specific chemical reaction but that is not altered by the reaction |
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| A compound that lacks carbon, for example, water |
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| A compound containing carbon; Examples include proteins, carbohydrates, and fats. |
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| A homogenous mixture of two or more components |
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| Subatomic particle that bears positive charge; Located in the atomic nucleus |
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| Nonsymmetrical molecules that contain electrically unbalanced atoms |
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| The symbol for hydrogen ion concentration; a measure of the relative acidity or alkalinity of a solution |
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| 1.) A chemical reaction that occurs between an acid and a base. 2.) Blockage of the harmful effects of bacterial exotoxins or viruses by the binding of antibodies to their functional sites. |
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| Dissociation; The breakdown of molecule in solution to form ions. |
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| Anything that occupies space and has mass |
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| A substance formed by living cells that acts as a catalyst in bodily chemical reactions |
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| Weak bond in which a hydrogen atom forms a bridge between two electron-hungry atoms; an important intramo-lecular bond. |
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| A substance that accepts hydrogen ions; proton acceptor; compare with acid |
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| A substance that liberates hydrogen ions when in an aqueous solution; compare with base |
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| A substance that breaks down into ions when in solution and is capable of conducting an electric current |
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| These vary in the number of neutrons they contain and they are different atomic form of the same element |
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| A fundamental particle that does not carry a positive or negative charge |
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